Modular pump assembly

ABSTRACT

A pump device is assembled from low cost modular components which can be fitted together in various ways to form preferred configurations and capacities for the pump. The pump device may be further provided with a reservoir for containing a chemical or other liquid to be dispensed into the primary liquid being pumped, and the reservoir can be included within a piston member of the pump so as to automatically dispense metered quantities of the chemical or other liquid with each pumping stroke of the piston member.

United States Patent 1191 Browne 1541 MODULAR PUMP ASSEMBLY [75] Inventor:

[73] Assignee: Browne Engineering Corporation,

Staunton, Va.

[22] Filed; June 5,1912

[21] App1.N0.;2s9,6o2

Ronald O. Browne, Staunton, Va.

[52] U.S. Cl. 417/503; 417/568; 417/DIG. l [5 l] Int. Cl. F0411 23/02; F04b 41/02 [58] Field of Search 417/503, 565, 566,568,

[56] References Cited UNITED STATES PATENTS 732,241 6/1903 Vanimanm. 417/503 955,321 4/1910 Cornell 417/547 1,322,236 11/1919 Fish 417/311 1,393,138 10/1921 Kelleym.. 417/503 2,056,936 10/1936 Hayward 417/360 2,164,103 6/1939 Baum 417/552 2,382,797 8/1945 Langan 417/566 2,414,696 1/1947 Miller 417/506 2,624,305 1/1953 Herrick et al 417/211 3,049,266 8/1962 Werry 137/995 3,267,865 8/1966 Deininger 417/506 3,312,765 4/1967 Scott 264/152 3,391,645 7/1968 Koza 417/566 1451 May 13, 1975 3,490,683 1/1970 Kocher 417/503 3,520,003 7/1970 Shaw 4/1 l5 3,679,332 7/1972 Yohpe 417/503 3,703,125 ll/1972 Paullukonis 92/170 FOREIGN PATENTS OR APPLICATIONS 530,968 8/1954 Belgium 417/568 434,508 4/1948 Italy 417/568 29,771 12/1910 United Kingdom... 417/503 453,345 6/1913 France 417/549 Primary Examiner-William L. Freeh Assistant Examiner-Gregory Paul LaPointe Attorney, Agent, or Firm-Cushman, Darby and Cushman [571 ABSTRACT A pump device is assembled from low cost modular components which can be tted together in various ways to form preferred configurations and capacities for the pump. The pump device may be further provided with a reservoir for containing a chemical or other liquid to be dispensed into the primary liquid being pumped, and the reservoir can be included within a piston member of the pump so as to automatically dispense metered quantities of the chemical or other liquid with each pumping stroke of the piston member.

9 Claims, 4 Drawing Figures SHEE 10F 2 0 o 5 z 3 2 HM M M., O 2 l 0 \mv 2 3 w 3 2 4 \\\\\\\\\\\\\\\\ll\\\\\\\\ M" N N "W x \1\1\\1\ N M 2 .I l www K 52 a 5 8 8 5L 5 a@ a 24 Ze 33 3 a 6 3 3 6 4 3 2 3 4 4 8 8 8 4,

1 MODULAR PUMP ASSEMBLY BACKGROUND AND BRIEF DESCRIPTION OF INVENTION The present invention relates to improvements in relatively simple pump devices of the type which can be manually operated to carry out pumping operations. Such pump devices have particular utility in chemical toilet systems having provision for recirculating and treating liquid from a holding tank and into the area of the toilet bowl for flushing the toilet bowl. Systems of this type are utilized in temporary or portable toilet facilities such as might be used at construction sites, golf courses, public events, or in marine vessels or other transportation vehicles. However, the pump device of the present invention can be used in other applications requiring a Simple and universal pump design for manually pumping a primary liquid from one place to another and for metering a secondary liquid into the flow stream of the primary liquid.

lt is known in this art to provide for pump designs and structures which include reciprocating piston members that can be manually operated to draw a liquid into a pumping chamber and to force the liquid out of the chamber to a point of use or storage. Various types of inlet and outlet valves have been designed to provide for a flow of liquid in a single direction, from the inlet side of the pumping chamber to its outlet side, with each pumping stroke of a piston which is in communication with the interior of the chamber. ln addition, it is known to include some form of chemical dispensing equipment with pump devices, as shown for example in U.S. Pat. Nos. 3,005,993 and 3,228,036.

The present invention represents an improvement over known pump designs by its provision for relatively simple, low cost modular components which can be fitted together in various ways to form preferred configurations and capacities for pumps. Furthermore, the modular components can be formed from readily available stock material, such as standard diameter polyvinyl chloride tubing, to produce pump devices of preferred configurations and capacities. The basic tubular components from which the pump device is assembled can be joined together in various ways, and one-way valve means used in the assembly can be manufactured in identical form so that a single type of structure may be used as an inlet valve means and as an outlet valve means for the assembled device.

Further features of the invention provide for assembly compensations for out-of-round conditions which may exist with standard, off-the-shelf plastic tubing so that there is no requirement for manufacturing or purchasing precision components for the pump device.

One embodiment of the invention provides for a pump device assembled from modular components `vhich include a first tubular component for receiving and carrying a reciprocating piston member and a second tubular component secured to the first tubular component in an interesting relationship therewith to define a pumping chamber between the two tubular components. Inlet and outlet openings communicating with the pumping chamber are defined by open ends of one or both of the tubular components, depending upon the assembled configuration of the pump, and first and second one-way valve means are positioned across the inlet and outlet openings to provide for a unidirectional flow of liquid through the pumping chamber in response to reciprocations of the piston member within the first tubular component. As previously stated, the one-way valve means preferably cornprise identical structures which may be used interchangeably in either the inlet or outlet positions. The piston member is manually operated to be reciprocated in the bore of the first tubular component to (a) draw a volume of liquid through the one-way valve means of the inlet and into the pumping chamber when the piston member is drawn in a direction away from the pumping chamber and (b) push the volume of liquid through the one-way valve means of the outlet when the piston is pushed in a direction towards said pumping chamber. Preferably, the first and second tubular components are formed from identical stock material having a common bore diameter and a common outside diameter for the two components, and the first tubular component is inserted into an opening formed through a wall of the second tubular component so as to provide for a strong securement of the first tubular component in a position which extends into one-half of the diameter of the second tubular component. Itis especially important in assemblies of this type to provide for reliable and strong structures which can withstand hard usage, and the preferred assembly of this invention satisfies such requirements.

The invention also provides for a mounting ring assembly for securing the pump device to a deck or bulkhead in such a way that the possibility of unauthorized removal of the device is substantially reduced. The mounting ring assembly includes first and second annular rings which function to fix the axial position of the pump device relative to opposed surfaces of a deck or bulkhead. The second annular ring is threaded into position over a sleeve portion of the first annular ring so as to function as a locking ring, and in a preferred mounting arrangement, the second annular ring is installed from beneath the deck or bulkhead so that the pump device cannot be removed through a disassembly of any exposed parts extending above the deck or bulkhead.

Another embodiment ofthe invention provides for a separate reservoir means for containing a second liquid to be dispensed into a first liquid being pumped by the pump device. The separate reservoir means may be included within the piston member itself so as to provide a ready supply of chemical or other liquid to be automatically metered into the pumping chamber with each intake stroke of the piston member. Alternatively, the separate reservoir means can be carried externally of the pump device to provide for a larger supply of chemical additive or other liquid to the pump device. Typically, it is desirable in certain uses of the pump device of this invention to provide for a treatment of a liquid being filtered and recirculated through a holding system, and such treatment requires the addition of a chemical agent which can kill bacteria, mask odors, and disinfect the primary liquid being pumped and circulated. Also, certain agents are added to dye liquids which are recirculated from holding tanks to give a more acceptable appearance to such liquids. For example, the separate reservoir means can serve to carry a supply of sodium hypochlorite solution, formaldehyde, or other known treating agent, for being metered into the liquid portion of' a toilet tank holding system as the liquid portion is pumped to a toilet bowl for purposes of flushing and cleansing the toilet bowl area.

These and other features and advantages of the present invention will be more fully appreciated from a reading of the detailed discussion which follows. ln that discussion reference will be made to the accompanying drawings as briefly described below.

BRIEF DESCRIPTION OF DRAWINGS FIG. l is an elevational view, in section, of a typical installation of the pump device assembly of the present invention, showing relationships between basic components of the assembly;

FIG. 2 is an elevational view taken at right angles to the FIG. 1 view, as seen generally on lines 2-2 but showing an alternative metering valve means, and connection therefor, as associated with a separate reservoir for introducing a chemical or other liquid into the pumping chamber of the assembly;

FIG. 3 is an external view, in reduced scale, of portions ofthe assembly shown in FIG. l to illustrate one configuration of pump available with the modular cornponents of the present invention; and

FIG. 4 is a view similar to FIG. 3, drawn in the same scale, to illustrate a second configuration available with the modular components of the pump device of the present invention.

DETAILED DESCRIPTION OF INVENTION Referring to FIG. l, a preferred embodiment of the present invention is illustrated in a typical installation in which the pump device is mounted through a deck or bulkhead so as to extend downwardly below the deck or bulkhead for being connected to conduits forming a part of a circuit through which fluid is to be pumped and treated.

The illustrated pump device is assembled from modular components which can be fitted together in various ways to form a preferred configuration and capacity for the pump. A first tubular component 12 functions to receive and carry a piston member 14 which is manually reciprocated within the first tubular component l2 with a handle 16 secured to an upper end of a rod portion I8 attached to the piston member 14. In this preferred embodiment, the rod portion 18 is formed from a smaller diameter tubular element which is designed to carry a chemical additive, or other liquid, for being metered into the flow stream of a liquid being pumped by this device. The smaller diameter tubular element 18 is closed at its lower end by a cup-shaped element which forms the head of the piston member I4. The upper end of the tubular element 18 is closed off by the handle 16 which is shown as having a downwardly depending annular sleeve 22 for being secured to the tubular element 18 so as to limit the downward movement of the piston member when the sleeve 22 contacts an upper surface 24 of an annular ring 2S ofa mounting ring assembly 26.

A sealing relationship is established between the piston member 14 and the inner bore of the first tubular component 12 by an O-ring means 28 carried in an annular groove formed around an outer surface of the piston member 14. In order to compensate for any out-ofround condition of the bore of the tubular component l2, the O-ring 28 is selected to have an Outside diameter slightly larger than the inside diameter of the bore of the first tubular component 12. In this way, the O- ring is compressed radially and uniformly about its circumference as it is inserted into the bore of the first tubular component I2, thereby providing for a sealing of the bore with the piston member 14. The annular groove into which the O-ring 28 is carried is somewhat wider in cross section, in the range of 0.002 0.004 inch, than the cross section of the O-ring itself, and this allows a limited freedom of movement of the O-ring within the groove as is necessary to effect a seal by the slightly oversized O-ririg. This arrangement allows for a compensation for out-of-round conditions of up to about 0.030 irich in the cylindrical bore of the first tubular component l2 and maintains the piston member 14 out of contact with the bore of the first tubular component l2. Thus, it is possible to use readily available tubular components formed from a plastic material, such as polyvinyl chloride, and to work with a range of out-of-round conditions which typically exist in such standard components. The annular groove for the O- ring means can be packed with grease or other lubricant prior to assembling the pump device. This also improves sealing of the piston within the tubular component.

The piston member 14 also carries a stop ring 30 secured to the smaller diameter rod portion 18 for limiting upward movement of the piston member as it is drawn upwardly to a point of contact between the stop ring 30 and a lower surface of the annular ring of the mounting ring assembly 26. This prevents a binding of the rod portion 18 inherent in pump devices when the piston is raised too high in its cylinder. Also, it provides for a stronger assembly when the piston rod is raised to its upper limit position.

The first tubular component 12 is vented with one or more openings at 3l to provide for displacement of air above the piston member 14 and to allow for drainage of any liquid which may leak past the O-ring means 28.

A pumping chamber 32 is defined by an intersection of the first tubular component 12 with a second tubular component 34 which is secured to the first tubular component to form a sealed relationship therebetween. In the configuration of FIG. l, the first and second tubular components are joined together at a right angle, with the first tubular component 12 being inserted into an opening formed through a wall portion of the second tubular component 34 so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component. This relationship is further illustrated in FIG. 2 wherein both the first and second tubular components 12 and 34 are formed from stock material having a common bore diameter and a common outside diameter. Insertion of the first tubular component into one half of the diameter of the second tubular component assures a very strong and reliable structure which can withstand a long life of hard usage.

In the FIG. l configuration, one end of the second tubular component 34 receives a mounting ring 36 having an opening 38 therethrough for defining an inlet opening for the pumping chamber 32. An opposite end of the second tubular component 34 receives a mounting ring 40 having a smaller diameter opening 42 for defining an outlet opening for the pumping chamber 32. One-way valve means 44, which are preferably identical structures, are mounted upstream and downstream of the inlet opening 38 and outlet opening 42, respectively, to permit only a unidirectional flow of liquid through the pumping chamber. The one-way valve means 44 comprise flapper valves formed from a sheet of rubber, neoprene or other elastomeric material. The sheet of material includes a cut through portion extending for about three quarters of the circumference of a circle to define the movable fiapper portion of the valve means. Each of the one-way valve means swings towards the right in the FIG. l view (as shown by dashed lines for the outlet valve means) to uncover their respective openings. Each one-way valve means 44 is secured in place by an associated annular block which is secured to one of the mounting rings 36 or 40 with screw fasteners 46. The annular blocks may cornprise structures having tubular portions extending therefrom to receive the ends of flexible conduits which form a part of' a circulation circuit into which the pump device is inserted. ln the illustrated embodiment, these blocks comprise an inlet block 48 and an outlet block 50. Since the f'lapper portions of the valve means 44 are essentially unreinforced and formed from relatively thin stock material (on the order of 60/1000 inch, for example). the valve means can be caused to collapse under extreme pressure conditions (for example, over l5 psig), thereby providing for a safeguard from excessive pressures for this type of pump device. For example, if excessive force is applied to the piston member during a pumping stroke, the inlet fiapper valve means is forced upstream through its mounting block, and this relieves the pressure within the pumping chamber. At most, this action results in a back flushing of any filter element installed in the inlet line, and no damage to the pump results.

The arrangement which has been described so far can be easily assembled from polyvinyl chloride tubing by cutting the tubing to appropriate lengths and by securing components together with a solvent for the particular material from which the tubing is manufactured. The capacity ofthe illustrated pump can be varied by adjusting the length of stroke or diameter of the piston member 14 and its associated first tubular component 12. lt can be appreciated that the pump device is operated by manually reciprocating the piston member I4 in the bore of the tubular component l2 to draw a volume of liquid through the upstream (towards the left in FIG. l) one-way valve means 44 and into the pumping chamber and a portion of the bore ofthe first tubular component 12. When this intake stroke is completed by the piston member 14 reaching its upper limit of travel relative to its associated tubular component 12,

the movement of the piston member is reversed so as to push the volume of liquid which has been drawn into the pump device out through the downstream (towards the right in FIG. l) one-way valve means 44 to a point of use of the pump liquid. Thus, there is provided a relatively simple structure which can be easily assembled from readily available materials to produce a pump device of a preferred capacity and configuration.

A further feature of the present invention is to provide for an automatic introduction of a chemical treating liquid into the liquid being pumped during a pumping operation. One possible use of the pump device of the present invention provides for a circulation of liquid from a holding tank of a chemical toilet system so that the liquid can be treated and utilized to flush and disinfect a toilet bowl. For this purpose, various chemical additives and agents have been utilized, but in the case of certain chlorine releasing chemicals, and other similar disinfecting agents, it is highly desirable to introduce the chemical additive into the pumped liquid at a point in time which is very close to when the liquid is to be used in the flushing and disinfecting application. The reason for this is that many such chemical agents have very short lives of effectiveness, and therefore, it is necessary to store the chemical agents separately from the holding tank of the system until liquid is to be pumped and treated for use in a disinfecting application.

The pump device of the present invention provides for such an automatic metering of a chemical additive at the time of pumping of' the primary liquid by connecting a separate reservoir means to the interior of the pumping chamber 32. ln the FlG. l embodiment, a separate reservoir means 5l is defined within the main body of the tubular rod portion 18 for carrying a quantity (for example, about one pint) of a liquid chemical to be dispensed into the liquid which is pumped through the pumping chamber 32. The reservoir means 51 has an inlet aperture 52 at its upper end for filling the reservoir means, and a closure 54 is provided to seal the aperture 52. A vent 55 allows entry of air into the reservoir means as liquid is metered therefrom. At its lower end, the reservoir means is provided with an outlet aperture 56 and a metering valve means 58 for controlling a flow of liquid from the reservoir means into the pumping chamber 32 of the pump device. The outlet aperture 56 is preferably packed with a known filtering material. ln the illustrated embodiment of FIG. l, the metering valve means includes valve plate means 60, in the form of a disc, which is urged by spring means 62 to normally contact an O-ring 64 for closing the outlet aperture 56 of` the resevoir means 5l. This metering valve means is designed to open the outlet aperture 56 when pressure conditions within the reservoir means 51 exceed pressure conditions within the pumping chamber 32 by an amount sufficient to overcome the force of the spring means 62 against the valve plate 60. In a typical construction, the spring means 62 applies a pressure in a range of` 3 to 4 ounces of pressure against the valve plate means 60, and this is sufficient to seal a head of pressure within the reservoir means of more than one psig (which would accommodate up to a 2 foot height of liquid chemical in the reservoir means 51). Upward movement ofthe piston member i4, in its intake stroke, creates a sufficient negative pressure (in the range of three to fourteen inches of mercury) to cause the valve means 60 to move away from the O- ring seal 64, to thereby permit a metered dispensing of liquid from the reservoir means 5l during the intake stroke. By varying the compression of spring means 62 and the size of the outlet aperture 56, it is possible to regulate the f'low of liquid which will be metered into each volume of liquid drawn into the pumping chamber 32. Typically, it may be desirable to meter approximately 0.1 1.0cc of chemical additive into a primary liquid in the type of application contemplated for the pump device of this invention.

FIG. 2 illustrates an alternative arrangement for metering a second liquid into a flow stream of a first liquid being pumped by the device of this invention. In this arrangement, the reservoir means (not illustrated) for containing the second liquid is carried externally of the pump device and is connected thereto by a conduit which communicates with the pumping chamber 32 through an extended tubular portion 55 defining the aperture 56 ofthe metering valve means 58. The metering valve means 58 of this arrangement could be identical to the one shown and described with reference to FIG. l, but the metering valve means which is actually shown in FIG. 2 comprises a different. and sometimes preferred, valve means. In both the FIG. l and FIG. 2 embodiments the metering valve means 58 function to meter controlled volumes ofa second liquid into the pumping chamber 32 with each intake stroke of the piston member 14. The FIG. 2 reservoir arrangement permits a storage of larger volumes of a chemical additive, or other liquid, such as might be required in installations which otherwise would demand frequent replenishing of the type of reservoir means discussed in the FIG. 1 embodiment.

The metering valve means shown in FIG. 2 comprises a universal valve structure which can be regulated to various metering pressure requirements through an ad justment of a screw member 59 which bears against a urethane valve disc 60. The screw member 59 is adjusted to establish a desired flexing of the valve disc against an annular seat so as to create a highly reliable seal which can be opened only when a predetermined pressure differential is established on opposite sides of the valve disc. The spring memory of the valve disc eliminates any requirement for a separate spring element of the type used in the FIG. 1 metering valve means. The metering valve means S8 of FIG. 2 includes a passageway 63 for bypassing the screw member 59.

Both of the metering valve means 58 of FIGS. l and 2 are preferably designed for use in either a piston head or pumping chamber wall. In this respect each metering valve means includes a threaded end portion 61 for being threaded through a wall portion of a pumping chamber (although a solvent weld may also be used with pumps and valves formed from a plastic material). In addition, each metering valve means 58 includes an extended end portion 55 for receiving a hose or conduit 70, as in the FIG. 2 arrangement. However, the extended end portion 55 also functions, in the FIG. 1 arrangement, to prevent a collection of sediment in the aperture 56 in the piston rod assembly.

Referring back to FIG. l, a further feature of the pump device of the present invention is a provision for mounting the device in a secure way through a deck or housing l so that unauthorized removal of the device can be prevented. This is accomplished with a mounting ring assembly 26 having a first annular ring 25 which includes a large diameter flange portion 78 at its upper end for fixing the axial position of the pump device against a top surface of the deck or bulkhead 10. The first annular ring also includes a downwardly depending smaller diameter sleeve portion 80 for being inserted through an opening formed in the deck or bulkhead. The smaller diameter sleeve portion 80 is provided with screw threads on its external surface so that a second annular ring 82, having internal threads, can be mated with the sleeve portion 80 to function as a locking ring which bears against a lower surface of the deck or bulkhead l0. The internal threads of the second annular ring 82 do not extend all the way to the top of the annular ring (in the FIG. 1 orientation), thereby leaving an internal annular recess which can ride over an unthreaded external surface of the first annular ring 25 when the pump device is installed through a very thin deck. Also, the second annular ring 82 may be provided with a number of radially extending lugs 83 which can be grasped or contacted for applying a turning moment to the annular ring 82. A further feature of the mounting ring assembly is its provision for an annular groove around its inside circumference for carrying out an 0-ring 84 which forms a seal between the mounting ring assembly and the tubular element 18 making up the main body of the piston rod portion. The O-ring 84 has a slightly smaller inside diameter than the outside diameter of the tubular element 18, thereby creating a compression seal of the ring against the tubular element 18. The annular groove into which the O- ring 84 is carried has a sufficiently deep cross section to allow a relatively free movement of the O-ring therein. This allows some surface contact between the tubular element 18 and inside circumferential surfaces of the first annular ring 25 so that a sufficient seal is formed without interfering with the ease of manual operation ofthe pump device. The first annular ring 25 is secured to the first tubular component l2 of the pump device by a threaded engagement 86 between the first annular ring 25 and an upper end of the first tubular component I2.

With the pump mounted as shown in FIG. 1, there is no way that the pump can be removed by a removal of components from the top side of the deck or bulkhead ll). However, the pump device can be removed for servicing by reaching through a service opening, or other access opening near the area occupied by the pump device, to unscrew the second annular ring 82 from the first annular ring 25. The annular ring 82 can then drop down onto the lower tubular component 34 without becoming lost or misplaced. This allows the first annular ring 2S to be lifted upwardly so that the tubular component l2 can be unscrewed from the first annular ring. Thereafter, the handle 16, its attached tubular element 18, and the upper annular ring 25 can be lifted upwardly from the deck or bulkhead for complete removal. The main tubular component l2 and its associated structures can be removed from below the bulkhead.

FIGS. 3 and 4 illustrate two possible configurations of pump devices which can be assembled with the basic tubular components of the present invention. FIG. 3 corresponds to the configuration shown in FIG. 1, and FIG. 4 illustrates a modification in which the inlet opening of the pump device is defined at a lower end of the first tubular component 12. Of course, the inlet and outlet openings may be reversed from the positions shown in the FIG. 4 arrangement.

In the FIG. 4 arrangement the first tubular component l2 is provided with a cutout portion 91 for allowing a flow of liquid from the inlet to the outlet side of the device. The second tubular component is fitted and secured to the outside cylindrical profile of the first tubular component. The inlet block 48, of the FIG. 4 embodiment, may be connected to another pipe communicating with a tank, barrel or other source of supply of liquid to be pumped.

Having described certain structures for preferred em bodiments of the invention, it can be appreciated that the invention provides for a relatively simple pump device which can be constructed in a variety of configurations and capacities and which is extremely strong and reliable for its intended uses. The device provides for an automatic metering of a second liquid into the primary liquid being pumped, and this is accomplished with relatively simple structures which can be manufactured at low cost and which are reliable in controlling a metered dispensing of the second liquid into the primary liquid. The pump device can be mounted through a deck or from a bracket member, or it can be simply hand held for pumping operations. For draining an area, the pump can be operated as a siphon by starting a liquid flow through the pump and to an outlet line which then discharges the liquid at a level lower than the area being drained without further pumping. Furthermore, it is possible to meter and mix, or react, two or more liquids into a primary liquid, or with each other, by adding additional metering valve means 58 to the pumping chamber. Also, the device which has been described can be installed through vertical bulkheads and in other attitudes from what has been illustrated in the disclosure herein. lt is contemplated that equivalent structures and designs can be substituted for those discussed above, and such substitutions are considered to be within the scope of protection defined in the claims which follow.

What is claimed is:

l. A pump device assembled from modular components which can be fitted together in various ways to form a preferred configuration and capacity for a pump, comprising:

a first tubular component for receving and carrying a reciprocating piston member therein;

a second tubular component, secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components;

a pumping chamber disposed between said inserted first and second tubular components, said pumping chamber being defined by the intersecting relationship of said first and second tubular components;

an inlet opening communicating with said pumping chamber for being connected to a source of supply of liquid to be pumped;

an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the liquid being pumped',

a first one-way valve means positioned across said inlet opening to prevent a back flow of liquid from said pumping chamber through said inlet opening;

a second one-way valve means positioned across said outlet opening to prevent a back flow of liquid from said conduit or other discharge area into said pumping chamber, said second one-way valve means being identical to said first one-way valve means so that the two one-way valve means can be used interchangeably;

a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of' said first tubular component when the piston mem ber is drawn in a direction away from said pumping chamber and (b) push said volume of liquid through said second Oneway valve means when the piston member is pushed in a direction towards said pumping chamber; and

a mounting ring assembly carried by said first tubular component to secure the pump device to a deck or bulkhead structure, said mounting ring assembly including:

a first annular ring having a larger diameter flange portion for fixing the axial position of the pump device against one surface of a deck or bulkhead and a smaller diameter sleeve portion connected to the flange portion for being inserted through an opening formed in said deck or bulkhead, said smaller diameter sleeve portion having a threaded external surface at its end which is re` mote from the flange portion and said smaller diameter sleeve portion being secured by threaded engagement to the threaded surface of the upper end of said first tubular component; and

a second annular ring having an internally threaded surface of a diameter which will allow a threaded engagement of the second annular ring with said first annular ring, said second annular ring being of a sufficient size to function as a locking ring which bears against a surface which is opposed to the said on surface of said deck or bulkhead to thereby permit a securement ofthe pump device through the deck or bulkhead.

2. A manually operated pump device which can be used for pumping a first liquid from a source to a point of use and which further functions to meter a second liquid into the first liquid as it is being pumped, comprising:

a first tubular component for receiving and carrying a reciprocating piston member therein',

a second tubular component secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components',

a pumping chamber disposed between said inserted first and second tubular components said pumping chamber being defined by the intersecting relationship of said first and second tubular components;

an inlet opening communicating with said pumping chamber for being connected to a source of supply of a first liquid to be pumped;

an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the liquid being pumped;

a first one-way valve means positioned across said inlet opening to prevent a back flow of liquid from said pumping chamber through said inlet opening;

a second one-way valve means positioned across said outlet opening to prevent a back flow of liquid from said conduit or other discharge area into said pumping chamber;

a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of said first liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of said first tubular component when the piston member is drawn in a direction away from said pumping chamber and (b) push said volume of liquid through said second one-way valve means when the piston member is pushed in a direction towards said pumping chamber;

a separate reservoir means for carrying a supply of a second liquid to be dispensed into said first liquid which is being pumped, said reservoir means having an outlet aperture communicating with said pumping chamber for dispensing said second liquid from the reservoir means into the first liquid being pumped through said pumping chamber;

a metering valve means for opening and closing said outlet aperture in response to a change in pressure differential which develops between said reservoir means and said pumping chamber as a result of the pumping of said first liquid into and out of said pumping chamber; and

a mounting ring assembly carried by said first tubular component to secure the pump device to a deck or bulkhead structure, said mounting ring assembly including:

a first annular ring having a larger diameter flange portion for fixing the axial position of the pump device against one surface of a deck or bulkhead and a smaller diameter sleeve portion connected to the flange portion for being inserted through an opening formed in said deck or bulkhead, said smaller diameter sleeve portion having a threaded external surface at its end which is re mote from the flange portion, said smaller diameter sleeve portion being secured by threaded engagement to the theaded surface of the upper end of said first tubular component; and

a second annular ring having an internally threaded surface of a diameter which will allow a threaded engagement of the second annular ring with said first annular ring, said second annular ring being of a sufficient size to function as a locking ring which bears against a surface which is opposed to the said one surface of said deck or bulkhead to thereby permit a securement of the pump device through the deck or bulkhead.

3. A hand operated waste pump for pumping a first liquid toilet waste product from an inlet to an outlet opening and assembled from modular components which can be easily fitted together with solvents, cements or the like in various ways to form a preferred configuration and capacity for a pump, said hand oper ated waste pump comprising:

a first tubular component for receiving and carrying a reciprocating piston member therein;

a second tubular component, secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components;

a pumping chamber disposed between said inserted first and second tubular components, said pumping chamber being defined by the intersecting relationship of said first and second tubular components;

an inlet opening communicating with said pumping chamber for being connected to a source of supply of said first liquid to be pumped;

an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the said first liquid being pumped',

a first one-way valve means positioned across said inlet opening to prevent a back flow of said first liquid from said pumping chamber through said inlet opening;

a second one-way valve means positioned across said outlet opening to prevent a back flow of said first liquid from said conduit or other discharge area into said pumping chamber, said second one-way valve means being identical to said first one-way valve means so that the two one-way valve means can be used interchangeably; and

a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of said first liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of said first tubular component when the piston member is drawn in a dorection away from said pumping chamber and (b) push said volume of said first liquid through said second one-way valve means when the piston member is pushed in a direction towards said pumping chamber,

wherein said piston member includes a self contained reservoir means therein for carrying a supply of a second liquid different from said first liquid, said second liquid to be dispensed into the first liquid which is being pumped, said self contained reservoir means having (a) an inlet aperture and closure therefor to permit periodic filling of the reservoir means and (b) an outlet aperture and a metering valve means disposed therein for controlling the flow quantity of said second liquid from the self contained reservoir means into said first liquid being pumped through said pumping chamber of said waste pump.

4. The hand operated waste pump of claim 3 wherein said first and second tubular components are formed from identical tubular stock material, thereby providing a common bore diameter and a common outside diameter for the two tubular components4 5. The hand operated waste pump of claim 4 wherein both tubular components comprise a polyvinyl chloride material secured together with a polyvinyl chloride solvent.

6. A manually operated waste pump device which can be used for pumping a first liquid from a source to a point of use and which further functions to meter a second different and distinct liquid into the first liquid as it is being pumped, comprising:

a first tubular component for receiving and carrying a reciprocating piston member therein;

a second tubular component secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components;

a pumping chamber disposed between said inserted first and second tubular components, said pumping chamber being defined by the intersecting relationship of said first and second tubular components;

an inlet opening communicating with said pumping chamber for being connected to a source of supply of a first liquid to be pumped;

an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the said f'irst liquid being pumped;

a first one-way valve means positioned across said inlet opening to prevent a back flow of said first liquid from said pumping chamber through said inlet opening;

a second one-way valve means positioned across said outlet opening to prevent a back flow of said f'irst liquid from said conduit or other discharge area into said pumping chamber;

a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of said first liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of said first tubular component when the piston member is drawn in a direction away from said pumping chamber and (b) push said volume of 2o said first liquid through said second one-way valve means when the piston member is pushed in a direction towards said pumping chamber;

a separate reservoir means for carrying a supply of a second different liquid to be dispensed into said first liquid which is being pumped, said reservoir means having an outlet aperture communicating with said pumping chamber for dispensing a predetermined quantity of said second liquid from the reservoir means into the first liquid being pumped through said pumping chamber; and

a metering valve means disposed for effectively opening and closing said outlet aperture in response to a change in pressure differential which develops between said reservoir means and said pumping chamber as a result of the pumping of said first liquid into and out of said pumping chamber; wherein said separate reservoir means is self coritained within said piston member.

7. The manually operated waste pump device of claim 6 wherein said metering valve means comprises a valve plate means which is normally urged to a closing position over said outlet aperture to prevent a dispensing of said second liquid from said reservoir means until such time as pressure conditions within said reservoir means exceed pressure conditions within said pumping chamber by an amount which is sufficient to overcome the urging of the valve plate to its closing position.

8. The manually operated waste pump device of claim 6 wherein said piston member carries an O-ring element to form a sealing relationship between said piston member and the bore into which it is fitted, said O- ring element having an outside diameter which is slightly greater than the inside diameter of said bore so that said O-ring will be radially compressed to compensate for an out-of-round condition of said bore relative to the outside surface of said piston member.

9. The hand operated waste pump device of claim 6 wherein said metering valve means comprises ari assembly having a valve disc which normally covers and seals an outlet aperture of the metering valve means until a predetermined pressure condition flexes the valve disc out of its sealing relationship with the aperture, and an adjustable screw means for bearing against a face of said valve disc for normally urging and maintaining said valve disc in a flexed condition against said outlet aperture so as to seal the outlet aperture until said predetermined pressure condition flexes the valve disc out of its sealing position.

llt l* ik Ik Ik 

1. A pump device assembled from modular components which can be fitted together in various ways to form a preferred configuration and capacity for a pump, comprising: a first tubular component for receving and carrying a reciprocating piston member therein; a second tubular component, secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components; a pumping chamber disposed between said inserted first and second tubular components, said pumping chamber being defined by the intersecting relationship of said first and second tubular components; an inlet opening communicating with said pumping chamber for being connected to a source of supply of liquid to be pumped; an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the liquid being pumped; a first one-way valve means positioned across said inlet opening to prevent a back flow of liquid from said pumping chamber through said inlet opening; a second one-way valve means positioned across said outlet opening to prevent a back flow Of liquid from said conduit or other discharge area into said pumping chamber, said second one-way valve means being identical to said first one-way valve means so that the two one-way valve means can be used interchangeably; a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of said first tubular component when the piston member is drawn in a direction away from said pumping chamber and (b) push said volume of liquid through said second one-way valve means when the piston member is pushed in a direction towards said pumping chamber; and a mounting ring assembly carried by said first tubular component to secure the pump device to a deck or bulkhead structure, said mounting ring assembly including: a first annular ring having a larger diameter flange portion for fixing the axial position of the pump device against one surface of a deck or bulkhead and a smaller diameter sleeve portion connected to the flange portion for being inserted through an opening formed in said deck or bulkhead, said smaller diameter sleeve portion having a threaded external surface at its end which is remote from the flange portion and said smaller diameter sleeve portion being secured by threaded engagement to the threaded surface of the upper end of said first tubular component; and a second annular ring having an internally threaded surface of a diameter which will allow a threaded engagement of the second annular ring with said first annular ring, said annular ring being of a sufficient size to function as a locking ring which bears against a surface which is opposed to the said one surface of said deck or bulkhead to thereby permit a securement of the pump device through the deck or bulkhead.
 2. A manually operated pump device which can be used for pumping a first liquid from a source to a point of use and which further functions to meter a second liquid into the first liquid as it is being pumped, comprising: a first tubular component for receiving and carrying a reciprocating piston member therein; a second tubular component secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components; a pumping chamber disposed between said inserted first and second tubular components said pumping chamber being defined by the intersecting relationship of said first and second tubular components; an inlet opening communicating with said pumping chamber for being connected to a source of supply of a first liquid to be pumped; an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the liquid being pumped; a first one-way valve means positioned across said inlet opening to prevent a back flow of liquid from said pumping chamber through said inlet opening; a second one-way valve means positioned across said outlet opening to prevent a back flow of liquid from said conduit or other discharge area into said pumping chamber; a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of said first liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of said first tubular component when the piston member is drawn in a direction away from said pumping chamber and (b) push said volume of liquid through said second one-way valve means when the piston member is pushed in a direction towards said pumping chamber; a separate reservoir meAns for carrying a supply of a second liquid to be dispensed into said first liquid which is being pumped, said reservoir means having an outlet aperture communicating with said pumping chamber for dispensing said second liquid from the reservoir means into the first liquid being pumped through said pumping chamber; a metering valve means for opening and closing said outlet aperture in response to a change in pressure differential which develops between said reservoir means and said pumping chamber as a result of the pumping of said first liquid into and out of said pumping chamber; and a mounting ring assembly carried by said first tubular component to secure the pump device to a deck or bulkhead structure, said mounting ring assembly including: a first annular ring having a larger diameter flange portion for fixing the axial position of the pump device against one surface of a deck or bulkhead and a smaller diameter sleeve portion connected to the flange portion for being inserted through an opening formed in said deck or bulkhead, said smaller diameter sleeve portion having a threaded external surface at its end which is remote from the flange portion, said smaller diameter sleeve portion being secured by threaded engagement to the theaded surface of the upper end of said first tubular component; and a second annular ring having an internally threaded surface of a diameter which will allow a threaded engagement of the second annular ring with said first annular ring, said second annular ring being of a sufficient size to function as a locking ring which bears against a surface which is opposed to the said one surface of said deck or bulkhead to thereby permit a securement of the pump device through the deck or bulkhead.
 3. A hand operated waste pump for pumping a first liquid toilet waste product from an inlet to an outlet opening and assembled from modular components which can be easily fitted together with solvents, cements or the like in various ways to form a preferred configuration and capacity for a pump, said hand operated waste pump comprising: a first tubular component for receiving and carrying a reciprocating piston member therein; a second tubular component, secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components; a pumping chamber disposed between said inserted first and second tubular components, said pumping chamber being defined by the intersecting relationship of said first and second tubular components; an inlet opening communicating with said pumping chamber for being connected to a source of supply of said first liquid to be pumped; an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the said first liquid being pumped; a first one-way valve means positioned across said inlet opening to prevent a back flow of said first liquid from said pumping chamber through said inlet opening; a second one-way valve means positioned across said outlet opening to prevent a back flow of said first liquid from said conduit or other discharge area into said pumping chamber, said second one-way valve means being identical to said first one-way valve means so that the two one-way valve means can be used interchangeably; and a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of said first liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of said first tubular component when the piston member is drawn in a dorection away from said pumping chamber and (b) push Said volume of said first liquid through said second one-way valve means when the piston member is pushed in a direction towards said pumping chamber, wherein said piston member includes a self contained reservoir means therein for carrying a supply of a second liquid different from said first liquid, said second liquid to be dispensed into the first liquid which is being pumped, said self contained reservoir means having (a) an inlet aperture and closure therefor to permit periodic filling of the reservoir means and (b) an outlet aperture and a metering valve means disposed therein for controlling the flow quantity of said second liquid from the self contained reservoir means into said first liquid being pumped through said pumping chamber of said waste pump.
 4. The hand operated waste pump of claim 3 wherein said first and second tubular components are formed from identical tubular stock material, thereby providing a common bore diameter and a common outside diameter for the two tubular components.
 5. The hand operated waste pump of claim 4 wherein both tubular components comprise a polyvinyl chloride material secured together with a polyvinyl chloride solvent.
 6. A manually operated waste pump device which can be used for pumping a first liquid from a source to a point of use and which further functions to meter a second different and distinct liquid into the first liquid as it is being pumped, comprising: a first tubular component for receiving and carrying a reciprocating piston member therein; a second tubular component secured to said first tubular component wherein a terminal end of said first tubular component is inserted into an opening formed through a wall of said second tubular component so as to secure the first tubular component in a position which extends into one-half of the diameter of the second tubular component, and at a right angle thereto, to provide a secure and strong assembly of the components; a pumping chamber disposed between said inserted first and second tubular components, said pumping chamber being defined by the intersecting relationship of said first and second tubular components; an inlet opening communicating with said pumping chamber for being connected to a source of supply of a first liquid to be pumped; an outlet opening communicating with said pumping chamber for being connected to a conduit or other discharge area for the said first liquid being pumped; a first one-way valve means positioned across said inlet opening to prevent a back flow of said first liquid from said pumping chamber through said inlet opening; a second one-way valve means positioned across said outlet opening to prevent a back flow of said first liquid from said conduit or other discharge area into said pumping chamber; a piston member fitted within a bore of said first tubular component for being manually reciprocated in said bore to thereby (a) draw a volume of said first liquid through said first one-way valve means into said pumping chamber and into a portion of the bore of said first tubular component when the piston member is drawn in a direction away from said pumping chamber and (b) push said volume of said first liquid through said second one-way valve means when the piston member is pushed in a direction towards said pumping chamber; a separate reservoir means for carrying a supply of a second different liquid to be dispensed into said first liquid which is being pumped, said reservoir means having an outlet aperture communicating with said pumping chamber for dispensing a predetermined quantity of said second liquid from the reservoir means into the first liquid being pumped through said pumping chamber; and a metering valve means disposed for effectively opening and closing said outlet aperture in response to a change in pressure differential which develops between said reservoir means and said pumping chamber as a result of the pumping of said first liquid into and out of sAid pumping chamber; wherein said separate reservoir means is self contained within said piston member.
 7. The manually operated waste pump device of claim 6 wherein said metering valve means comprises a valve plate means which is normally urged to a closing position over said outlet aperture to prevent a dispensing of said second liquid from said reservoir means until such time as pressure conditions within said reservoir means exceed pressure conditions within said pumping chamber by an amount which is sufficient to overcome the urging of the valve plate to its closing position.
 8. The manually operated waste pump device of claim 6 wherein said piston member carries an O-ring element to form a sealing relationship between said piston member and the bore into which it is fitted, said O-ring element having an outside diameter which is slightly greater than the inside diameter of said bore so that said O-ring will be radially compressed to compensate for an out-of-round condition of said bore relative to the outside surface of said piston member.
 9. The hand operated waste pump device of claim 6 wherein said metering valve means comprises an assembly having a valve disc which normally covers and seals an outlet aperture of the metering valve means until a predetermined pressure condition flexes the valve disc out of its sealing relationship with the aperture, and an adjustable screw means for bearing against a face of said valve disc for normally urging and maintaining said valve disc in a flexed condition against said outlet aperture so as to seal the outlet aperture until said predetermined pressure condition flexes the valve disc out of its sealing position. 